Free Vibration Of Anisotropic Composite Thin-Walled Beams Of Closed Cross-Section Contour

Song, Ohseop; Librescu, Liviu

doi:10.1006/jsvi.1993.1325

Cited by 178 publications

(82 citation statements)

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“…The box-beams walls were modeled as orthotropic-ply laminated plates, so that the elastic properties vary both through the thickness and around the box-beams contour; deformation is described in terms of extension, bending, twisting, shearing, and torsion-related out-of-plane warping. Song and Librescu [5] focused on the formulation of the dynamic problem of laminated composite thick-and thinwalled, single-cell beams of arbitrary cross-section and on the investigation of their associated free vibration behavior. Qin and Librescu [6] provided further contribution and validations on a shear-deformable theory of anisotropic thinwalled beams.…”

Section: Introductionmentioning

confidence: 99%

Flexural–torsional behavior of thin-walled composite box beams using shear-deformable beam theory

Lee

2008

Engineering Structures

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Citation: Vo, Thuc and Lee, Jaehong (2008) Flexural-torsional behavior of thin-walled composite box beams using shear-deformable beam theory. Engineering Structures, 30 (7). 1958 -1968 Northumbria University has developed Northumbria Research Link (NRL) to enable users to access the University's research output. Copyright © and moral rights for items on NRL are retained by the individual author(s) and/or other copyright owners. Single copies of full items can be reproduced, displayed or performed, and given to third parties in any format or medium for personal research or study, educational, or not-for-profit purposes without prior permission or charge, provided the authors, title and full bibliographic details are given, as well as a hyperlink and/or URL to the original metadata page. The content must not be changed in any way. Full items must not be sold commercially in any format or medium without formal permission of the copyright holder. The full policy is available online: http://nrl.northumbria.ac.uk/policies.html This document may differ from the final, published version of the research and has been made available online in accordance with publisher policies. To read and/or cite from the published version of the research, please visit the publisher's website (a subscription may be required.) This paper presents a flexural-torsional analysis of composite box beams. A general analytical model applicable to thin-walled composite box beams subjected to vertical and torsional load is developed. This model is based on the shear-deformable beam theory, and accounts for the flexural response of the thin-walled composites for arbitrary laminate stacking sequence configuration, i.e. unsymmetric as well as symmetric. Governing equations are derived from the principle of the stationary value of total potential energy. Numerical results are obtained for thin-walled composites under vertical loading, addressing the effects of fiber angle and span-to-height ratio of the composite beam. Flexural-torsional behavior of thin-walled composite box beams using shear-deformable beam theory

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Section: Introductionmentioning

confidence: 99%

Flexural–torsional behavior of thin-walled composite box beams using shear-deformable beam theory

Lee

2008

Engineering Structures

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“…Chandra et al [6] presented a theoretical-cum-experimental study of free vibration characteristics of thin-walled composite box beams with bending-twist and extension-twist coupling under rotating conditions. Song and Librescu [7] focused on the formulation of the dynamic problem of laminated composite thickand thin-walled, single-cell beams of arbitrary cross-section and on the investigation of their associated free vibration behavior. Armanios and Badir [8] derived the equations of motion for free vibration analysis of anisotropic thin-walled closed-section beams using a variational asymptotic approach and Hamilton's principle.…”

Section: Introductionmentioning

confidence: 99%

Free vibration of thin-walled composite box beams

Lee

2008

Composite Structures

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Free vibration of a thin-walled laminated composite beam is studied. A general analytical model applicable to the dynamic behavior of a thin-walled composite box section is developed. This model is based on the classical lamination theory, and accounts for the coupling of flexural and torsional modes for arbitrary laminate stacking sequence configuration, i.e. unsymmetric as well as symmetric, and various boundary conditions. A displacement-based one-dimensional finite element model is developed to predict natural frequencies and corresponding vibration modes for a thin-walled composite beam. Equations of motion are derived from the Hamilton's principle. Numerical results are obtained for thin-walled composites addressing the effects of fiber angle, modulus ratio, and boundary conditions on the vibration frequencies and mode shapes of the composites.

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“…The flapwise bending-torsion or flapwise-chordwise bending vibrations coupling effects can be observed for the 1 thin-walled laminated beams. The theory of the thin-walled beams was developed in the papers by Librescu and Song [1][2][3][4]. There are presented many analytical solutions for the vibrations occurring in this type of structures.…”

Section: Introductionmentioning

confidence: 99%

Modal Analysis of Laminated “CAS” and “CUS” Box-Beams

Gawryluk¹,

Bocheński²,

Teter³

2017

Archive of Mechanical Engineering

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In the paper, the authors discuss the numerical and experimental modal analysis of the cantilever thin-walled beams made of a carbon-epoxy laminate. Two types of beams were considered: circumferentially asymmetric stiffness (i.e., CAS) and circumferentially uniform stiffness (i.e., CUS) beams. The layer-up configurations of the laminate were chosen to get a vibration mode coupling effect in both analysed cases. The aim of the paper was to perform the numerical and experimental modal analysis of the composite structures, when a flapwise bending with torsion coupling effect or flapwise-chordwise bending coupling effect took place. Firstly, numerical studies by the finite element method was performed. The numerical simulations were carried out by the Lanczos method in the Abaqus software package. The natural frequencies and the corresponding free vibration modes were determined. Next, the experimental modal analyses of the CAS and CUS beams were performed. The test stand was consisted of a special grip, two beams with an adhered holder, the LMS Scadas III system with a modal hammer and an acceleration sensor. Finally, the results of both methods were compared.

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Free Vibration Of Anisotropic Composite Thin-Walled Beams Of Closed Cross-Section Contour

Cited by 178 publications

References 0 publications

Flexural–torsional behavior of thin-walled composite box beams using shear-deformable beam theory

Flexural–torsional behavior of thin-walled composite box beams using shear-deformable beam theory

Free vibration of thin-walled composite box beams

Modal Analysis of Laminated “CAS” and “CUS” Box-Beams

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